광섬유 브래그 격자 감지 기술 백과사전 - FBG FAQ - FBG 센서 FAQ - FBG 복조기 FAQ - FBG 일반 응용 문제 분석

This article analyzes the advantages 및 benefits brought by good pressure resistance in FBG sensors, including the expansion of application environments 및 the convenience in engineering construction. It also introduces the 'OFSCN® Capillary Seamless Steel Tube Series Fiber Bragg Grating Sensor'  produced by DCYS (These series of products are all high-pressure-resistant fiber optic gratingFBG sensors used for temperature, strain, or stress measurements). It shows part of the physical illustrations 및 parameters.

1. 고압 저항 광섬유 브래그 격자 센서 (FBG 센서)의 구조 및 장점 (FBG 온도계, FBG 온도 프로브)

압력 (외부, 내부 및 측면)에 저항하는 능력은 FBG 센서가 사용될 수 있는 환경을 직접 결정하며, FBG 센서 (FBG 프로브)의 엔지니어링 구성에도 영향을 미칩니다. 압력 저항의 관점에서 FBG 센서 (FBG 프로브)에 좋은 압력 저항이 가져다주는 장점을 간략하게 설명하겠습니다.

그림 1

The 'OFSCN® Capillary Seamless Steel Tube FBG Sensor' produced by DCYS is made of stainless steel seamless tubes. Benefiting from the characteristics of stainless steel material 및 seamless tube structure, this series of FBG sensors ( FBG probes) has high pressure resistance. The high pressure resistance mentioned here includes the ability to withstand external pressure, internal pressure, 및 lateral pressure.

그림 2	그림 3

2. Pressure  Resistance of OFSCN® Capillary® Seamless Steel Tube Fiber Bragg Grating Sensors (FBG sensors, FBG probes)

The main body of the OFSCN® Capillary Seamless Steel Tube FBG sensor ( FBG probe) is made of stainless steel seamless tubes. The standard outer diameter of the OFSCN® Capillary Seamless Steel Tube FBG sensor ( FBG probe) is 0.9 mm, with a wall thickness of 0.18 mm (see Figures 1 및 2). Based on our calculations, the pressure resistance of the main body of the sensor is greater than 180 MPa (external pressure).。

그림 4

180 MPa라는 숫자는 많은 사람들에게 직관적으로 이해되지 않을 수 있습니다. 일상생활에서 대기압은 약 0.1 MPa이며, 이는 수심 10미터의 수압과 거의 동일합니다. 1 MPa는 수심 100미터의 수압과 거의 같고, 180 MPa는 수심 18,000미터의 수압과 대략 같습니다.

The deepest known point on Earth is the Mariana Trench, with a depth of 11,034 meters (approximately 110 MPa of pressure). If someone commissioned us to produce an OFSCN® Capillary Seamless Steel Tube FBG Sensor of such length 및 threw it into the deepest part of the Earth for fiber sensing, there would be no problem. Our sensor would not be damaged by the water pressure at that depth. Because our philosophy is: 'OFSCN®, make optical fiber stronger!'

그림 5

In terms of pressure resistance, there is no comparison between OFSCN® Capillary Seamless Steel Tube FBG Sensors 및 traditional FBG sensors. They are not product in the same level, so there is no need to elaborate further.

3. Application 및 Construction Advantages of OFSCN® Capillary Seamless Steel Tube Fiber Bragg Grating Sensors (FBG sensors , FBG probes) with High Pressure Resistance

The high pressure resistance of OFSCN® Capillary Seamless Steel Tube FBG Sensors greatly expands their range of applications. In the past, it was challenging to measure high-pressure locations deep within the Earth, but with the availability of OFSCN® seamless steel tube products (including FBG sensors, distributed fiber optic sensors, special fiber optic jumpers, 및 seamless steel tube sensing cables), communication 및 measurement in these high-pressure locations have become less difficult.

In terms of engineering construction, similar to the advantages of high tensile strength, the high pressure resistance of OFSCN® Capillary Seamless Steel Tube FBG Sensors directly reduces the difficulty 및 losses in construction, thus lowering the installation cost of the grating sensors.

또한, 엔지니어링 시공 중 충돌이 발생하는 것은 불가피하며, 격자 센서가 다른 재료나 테스트 대상 물체에 의해 직접 덮이거나 압착될 수 있습니다. 이러한 상황에서 센서의 측면 압력 저항 능력은 매우 중요합니다.

Based on our calculations, the standard OFSCN® Capillary Seamless Steel Tube FBG Sensor can withstand lateral pressure of more than 9000 N. In practical applications, our FBG sensors can be placed on the road surface 및 withstand repeated pressure from small cars. Apart from surface wear, there will be no actual damage to the sensors.